PURPOSE: The aim of the study was to compare results after 1 and 3 years when single crowns supported by CerAdapt (test) ceramic abutments or CeraOne (control) titanium abutments were loaded. MATERIALS AND METHODS: The material was divided into two groups: in group A, 69 (34 test, 35 control) abutments/crowns from all involved clinics were followed for 1 year; and in group B, 20 (10 test, 10 control) abutments/crowns from one of the clinics were followed for 3 years. RESULTS: No implant failed, giving a cumulative success rate of 100% for the implants. Two CerAdapt abutments in group A fractured, giving a cumulative success rate of 93% for the CerAdapt and 100% for the CeraOne abutments after 1 year. No abutment failed in group B, giving a cumulative success rate of 100% both for the CerAdapt and the CeraOne abutments between 1 and 3 years. The CerAdapt fractures might have been due to the fact that the abutments were impaired through too-extensive preparation and/or had been exposed to a too-high bending moment. Almost no marginal bone loss was recorded, indicating a stable bone situation both at CerAdapt and CeraOne abutments on single-tooth implants. Healthy conditions, with a relatively stable level of the periimplant mucosa in relation to the abutment/crown, were recorded for soft tissues both at CerAdapt and CeraOne abutments. Both clinicians and patients rated the esthetic result as excellent for practically all cases. CONCLUSION: The results demonstrate the esthetic possibilities and the safety of single-tooth replacement when accepted treatment concepts are followed and documented components are used. The tested abutments worked well, although the fractured CerAdapt abutments indicate that ceramic abutments are more sensitive to handling procedures than the titanium abutments.

Adolescent↗

PubMedDate not supplied

[Osseointegrated implants for the retention of restorative jaw prostheses and facial prostheses for functional and esthetic rehabilitation following tumor surgery].

To restore the masticatory function after tumor surgery, 110 transmucosal intraoral implants have been inserted in 21 patients, and 26 percutaneous implants in a total of 9 patients for the stabilization of facial prostheses. While 12 of the intraoral implants had to be removed for lack of bony integration, the losses of the percutaneous implants for the stabilization of facial prostheses were exclusively due to tumor recurrences in the direct vicinity of the implants. Our previous results in the use of osseointegrated implants for the retention of restorative maxillofacial prostheses show a limited incidence of complications and give reason to expect long-term success in functional and esthetic rehabilitation. This method provides a decisive improvement in the quality of the life of tumor patients compared to the procedures used up to now.

Dental Implantation, Endosseous↗

PubMedDate not supplied

A 5-year multicenter study on implant-supported single crown restorations.

In this multicenter prospective study, the results achieved with the use of Brånemark implants for single tooth replacement were evaluated. The overall cumulative success rate was 95.9% for implants and 91.1% for crowns. Two of the 99 implants placed had to be removed before the prosthodontic stage of treatment; thus, 97 were restored with CeraOne crowns. Seventy-seven implants were evaluated radiographically at the 1-year follow-up, 57 at 3 years, and 47 at 5 years. Mean marginal bone resorption was well within the limits set by Albrektsson et al in 1986. The status of the soft tissue around crowns and adjacent teeth remained stable over the evaluation period. The gold abutment screw in the CeraOne system seems to have eliminated the problem of loosening abutment screws in single tooth replacements. The results suggest that the Brånemark system can be safely used for tissue-integrated replacement of single teeth.

Adolescent↗